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Finding the Fourth Proportional to 40,900.80, 61,351.20 and 30,532.80

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Solution

The fourth proportional to 40,900.80, 61,351.20 and 30,532.80 is: 45,799.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,900.80 : 61,351.20 = 30,532.80 : x
  2. Step 2: Convert to fraction form
    40,900.80/61,351.20 = 30,532.80/x
  3. Step 3: Cross multiply
    40,900.80x = 61,351.20 × 30,532.80
  4. Step 4: Simplify right side
    40,900.80x = 1,873,223,919.36
  5. Step 5: Solve for x
    x = 1,873,223,919.36/40,900.80
  6. Step 6: Final answer
    x = 45,799.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.